UNSC Cadet Thomas Lasky must conquer his inner fears and join forces with super-soldier John-117 to take down a massive faction of the Covenant.

After flying home to L.A. for the funeral of his estranged record-producer father, a struggling man discovers that the will stipulates that he must deliver $150,000 in cash to a 30-year-old alcoholic sister he never knew existed, and her troubled 12-year-old son.

The Autobots continue to work for NEST, now no longer in secret. But after discovering a strange artifact during a mission in Chernobyl, it becomes apparent to Optimus Prime that the United States government has been less than forthright with them.